lgeek

23 ms·

151.
by lgeek 13y ago
Since they're low volume, off-the-shelf availability is bound to be an important factor. I've only seen LiFePO4 cells in either soft pouch packages or hard cylindrical packages, and in this case the choice seems obvious.
152.
by lgeek 13y ago
> Kickstarter's FAQ clearly states that you need to be a US, UK (or now Canadian) citizen I thought the citizen part sounded strange so I did a quick check. According to [0] you only need to be a permanent resident. [0] http:/
153.
by lgeek 13y ago
> below 150ms end-to-end latency Is that network latency or video latency?
154.
by lgeek 13y ago
> Thermal throttling is extremely difficult to detect in xperf traces. It is done automatically by the CPU or the motherboard, and the operating system (OS) doesn’t realize that it is happening. I use the xperf toolset for these investig
155.
by lgeek 13y ago
Initially I thought something along these lines as well. But according to the article, it was common practice: > They’d followed his case in the newspapers and noted the shiver it had sent down the spines of Wall Street’s software develo
156.
by lgeek 13y ago
> They can hire the talent able to figure out decoding these trivial radio signals. I don't expect even older radio access systems to be that simple to abuse. For example this application note from Atmel[0] describes such a system.
157.
by lgeek 13y ago
Transmeta was doing dynamic binary translation from x86 to VLIW. I think the grandparent comment is saying that you could distribute programs in an IR and then compile them before running.
158.
by lgeek 13y ago
No, cubieboard and cubieboard2 are identical apart from the SoC. Both use RTL8201CP as an Ethernet PHY, which only supports 10/100 mbps. Neither has WiFI.
159.
by lgeek 13y ago
The author is describing a cubieboard2, which is $59: https://cubieboard.myshopify.com/collections/home-slide/prod...
160.
by lgeek 13y ago
> I would've thought majority of shared hosting providers have much higher CPU, RAM and ethernet speeds They do, but when you rent a VPS you're essentially getting to use that hardware in timeslices (and you only get a part of
161.
by lgeek 13y ago
I was expecting the 'tiny hardware' to be some microcontroller. A dual core Cortex A7 @ 1 GHz with 1 GB of RAM is comparable in performance with lower spec VPSes that many people use to host personal websites/blogs. I guess t
162.
by lgeek 13y ago
> Consider the fact that underground trains have drivers even though technically they are not needed. The London DLR[0] has been automated since it was opened in '87. It travels on the surface too. [0] http://en.wikipedia
163.
by lgeek 13y ago
> EDSAC - widely accepted as the first proper "stored program" computer This is debatable at the very least, since Manchester Baby was completed an year earlier[0] and Manchester Mark 1[1] was operational before EDSAC ran its f
164.
by lgeek 13y ago
As far as I know, Tor is theoretically vulnerable to a correlation attack by an entity capable of monitoring the entry and exit nodes. Personally, I thought having this capability, plus actually implementing the attack was a bit far-fetched
165.
by lgeek 13y ago
Offtopic, but: > the proprietary drivers are limited to the very bizarre 1920x1920 maximum joined resolution That's not true. I'm currently using 2 1080p screens on a HD7870. You just have to initially set it up using amdcccle
166.
by lgeek 13y ago
I disagree, tape isn't that reliable for covering larger areas with sharp and uneven surfaces. Plus, it tends to peel off by itself when heated. Should be better to just secure the two boards apart from each other at opposite ends of t
167.
by lgeek 13y ago
Is the power adapter board sitting on top of the Pi? They should be separated by some panel to avoid shortcircuits and/or feeding mains power into it. It looks like there's enough space too.
168.
by lgeek 13y ago
> There's no way you'd get a 20x boost in bandwidth between the A8 and A15 (both of which are ARMv7 and DDR3 is not 20x faster than DDR2) There are a few factors at work here: * A15 was designed to have more memory bandwidth in
169.
by lgeek 13y ago
> Intel's Xeon Phi cards pack 240 x86 CPUs per card > We've got a stack of then in the office; they're pretty interesting. That's funny, seeing as the only Phi coprocessor you can buy right now only has 60 cores [0
170.
by lgeek 13y ago
I've recently benchmarked RAM bandwidth and latency on computers based on i.MX53 (Cortex-A8), Exynos4 (Cortex-A9) and Exynos5 (Cortex-A15). RAM throughput increases by something like 20 times between the A8 and the A15 platforms. So wh
171.
by lgeek 13y ago
I think the memory is mounted on top of the SoC as a package on package. https://en.wikipedia.org/wiki/Package_on_package
172.
by lgeek 13y ago
Are those internships and jobs aimed at relatively competent students/grads? I'm asking because those salaries would have been considered quite low back in 2008 before I've emigrated.
173.
by lgeek 13y ago
> the initialization can be done at compile time, or (sometimes, in C++) on program startup With ELF binaries for C programs it's done at startup as well. The data segment is created as having memory size SIZEM and file size SIZEF. If S
174.
by lgeek 13y ago
You're right about this. On my GNU/Linux machine, main is in the data segment. The process receives a segfault for trying to execute from a page marked as not executable. (gdb) print &main $1 = (int *) 0x600864 <main>
175.
by lgeek 13y ago
to3m is correct. On my GNU/Linux machine main() is called from __libc_start_main(). A ret instruction in main() returns to __libc_start_main(), which in turn calls exit().
176.
by lgeek 13y ago
An empty file would do: https://news.ycombinator.com/item?id=5762578
177.
by lgeek 13y ago
Actually you don't have to link it separately if you don't link against stdlib. See my comment here: https://news.ycombinator.com/item?id=5762578
178.
by lgeek 13y ago
Does it work if you specify an entry address? Something like this: gcc -nostdlib ./empty.c -e0 -o ./empty
179.
by lgeek 13y ago
You can build it with a single command: gcc -nostdlib ./empty.c -o ./empty Edit: This one actually runs correctly: $ touch empty.c $ gcc -static -nostartfiles ./empty.c -e_exit -o ./empty $ ./empty && echo $? >
180.
by lgeek 13y ago
As far as I know, Debian armhf is compiled for ARMv7. This means that the compiled executables will sometimes use instructions that aren't implemented on older ARM cores. As the processor on RaspberryPi is ARMv6, don't expect to ever run th

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